摘要
要基于统计优先级的多址接入协议(SPMA,Statistical Priority-based Multiple Access protocol)应用于机载武器协同控制网络,其具有低时延和高传输成功率的特征。SPMA协议的信道负载统计和不同优先级业务的阈值设计是其关键技术点。针对SPMA协议负载统计实时性和信道利用率不高的问题,本文提出一种基于跨层信道感知的SPMA协议自适应阈值算法,建立了跨物理层和链路层的窗长可变的信道负载统计模型,利用不同业务接入的阅值数学表达式,降低碰撞概率,在满足高优先级业务服务质量要求基础上,提高系统吞吐量。仿真结果表明:采用该算法可实时准确反映当前信道占用情况,在满足高优先级业务传输能力要求下,系统吞吐量得到提升。
Statistical Priority-based Multiple Access protocol(SPMA)is applied to airborne weapon cooperative control networks,which has the characteristics of low latency and high transmission success rate.The channel load statistics and the threshold design of different priority services of SPMA are two of its key technical points.Aiming at the problems of real-time load statistics and low channel utilization of SPMA protocol,an adaptive threshold algorithm is proposedbased on the Cross-layer channel Awareness for SPMA protocol,establishinga statistical model of variable channel load of window length across physical layers and link layers.This algorithmuses the threshold mathematical expressions of different service access to reduce the collision probability,so as to improve the system throughput on the basis of meeting QoS requirements for high-priority businesses.Simulation results show that the algorithm can accu-rately reflect the current channel occupancy in real time,and ensure the success rate of high-priority data transmission under the condition of meeting the requirements of high-priority service transmission capacity.
作者
杨志明
李金喜
张亦居
YANG Zhi-ming;LI Jin-xi;ZHANG Yi-ju(China National Aeronautical Radio Electronics Research Institute,Shanghai 200241,China)
出处
《航空电子技术》
2023年第2期39-44,共6页
Avionics Technology
关键词
基于统计优先级的多址接入
跨层
信道感知
负载统计
自适应阈值
statisticalpriority-based multiple access
cross-layer
channel awareness
load statistics
adaptive threshold
